Oscilloscope Patterns and Waveforms

Inspection Using An Oscilloscope (Reference)

Fuel injector (FS, RS) control




- Terminal connected:
FS: 2G (+)-Negative battery terminal
RS: 2D (+)-Negative battery terminal
- Oscilloscope setting: 5 V/DIV (Y): 5 ms/DIV (X), DC range
- Measurement condition: Racing after warm-up (no load)

Field coil control (Generator)




- Terminal connected: 21 (+)-Negative battery terminal
- Oscilloscope setting: 0.5 V/DIV (Y): 1 ms/DIV (X), DC range
- Measurement condition: Idling after warm-up (no load)

Fuel injector (FP1, RP1) control




- Terminal connected:
FP1: 2M (+)-Negative battery terminal
RP1: 2J (+)-Negative battery terminal
- Oscilloscope setting: 5 V/DIV (Y):10 ms/DIV (X), DC range
- Measurement condition: Idling after warm-up (no load)




- Terminal connected:
FP1: 2M (+)-Negative battery terminal
RP1 : 2J (+)-Negative battery terminal
- Oscilloscope setting: 5 V/DIV V): 10 ms/DIV (X), DC range
- Measurement condition: Cranking while the engine is cold. (ECT: Approx. 20 °C {68 °F})